已知n为正整数,且x²ⁿ=5,求3(xⁿ)²+2(x³ⁿ)²+35的值

问题描述:

已知n为正整数,且x²ⁿ=5,求3(xⁿ)²+2(x³ⁿ)²+35的值

3(xⁿ)²+2(x³ⁿ)²+35
=3x²ⁿ+2(x²ⁿ)³+35
=3*5+2*5³+35
=15+250+35
=300