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2 + 2 la puterea 2 + 2 la puterea 3 +...... 2 la puterea 100

Răspuns :

2+2²+2³+...+2¹⁰⁰=

2+2²+2³+...+2¹⁰⁰ =(2+2²)+(2³+2⁴)...+(2⁹⁷+2⁹⁸)+(2⁹⁹+2¹⁰⁰)=

=(2+2²) +2²(2+2²)+2⁴(2+2²)+..........+2⁹⁶(2+2²) + 2⁹⁸(2+2²)

=(2+2²) (1 + 2² +2⁴ +..............+2⁹⁶ +2⁹⁸)

2 + 2² =2 +4 = 6

2+2²+2³+...+2¹⁰⁰ = 6 · (1 + 2² +2⁴ +..............+2⁹⁶ +2⁹⁸)