Question

(x + 1)^7
Use Pascal's Triangle and Binomial.Theorem

Answer 1

x⁷+7x⁶+21x⁵+35x⁴+35x³+21x²+7x+1

Explanation:

(x + 1)⁷: Pascal's Triangle for (a+b)⁷

a₇+7a⁶b+21a⁵b²+35a⁴b³+... + 7a¹b⁶ + b⁷

x⁷+7x⁶+21x⁵+35x⁴+35x³+21x²+7x+1