5) In an AP the 9th Term is 2 times the 4th Term and the 12th Term is 78. What is the sum of the first twenty terms? 6) In a GP the 8th term is 384 and the 5th term is 48. Find the sum of the first 10 terms.

Q: Find the 102nd term of: -8, -14, -20, ....

A: Solution

Q: (8x² +1) +(12x²+6)

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Q: Which expression has a sum of 42?

A: The objective is to find the expression which has sum of 42.

Q: When you grouped the 4 terms in the second line why did you change the sign in the middle?

A: We have to solve  45z3 - 27z2 - 5z + 3 = 0

Q: difference between the sum of (x+5) and the sum of x+5 x was 3,4,7,3

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Q: Write a formula which describes all fractions which kiss 7/11?

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Q: What two numbers have a sum of -12

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Q: 7 men have seven wives, each man and each wife have seven children, what's the total number of…

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Q: If 6 is subtracted from three times a number, the result is 24

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Q: Find for the sum of the first 50 negative even integers.

A: Negative even integers :-    -2,-4,-6,-8, ....... This is AP series with a=-2, d=-2