(x+y)^2=x^2 + 2xy + y2, subsitute (-2) for x,and (-1) for y, and check if the left hand side is equal to right hand site, also perform this problem in (x+y)^3=x^3+3x^2y+3xy^2+y^3 .
(x+y)^2=x^2 + 2xy + y2, subsitute (-2) for x,and (-1) for y, and check if the left hand side is equal to right hand site, also perform this problem in (x+y)^3=x^3+3x^2y+3xy^2+y^3 .
Chapter12: Sequences, Series And Binomial Theorem
Section12.4: Binomial Theorem
Problem 12.78TI: Find the coefficient of the x4 term of (x+2)7.
Question
(x+y)^2=x^2 + 2xy + y2, subsitute (-2) for x,and (-1) for y, and check if the left hand side is equal to right hand site, also perform this problem in (x+y)^3=x^3+3x^2y+3xy^2+y^3 .
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