Menyelesaikan 7 * (n(n + 1))/2 - 4n = | Equatix - Math Solver

Fractions & Decimals

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$7\times\frac{n(n+1)}{2}-4n=$$