Verify whether $1 + 2 + 3 + \ldots + n = \frac { n } { 2 } ( n + 1 ) + 1$ is true for $n = 1$.
A) yes
B) no

Name: Verify whether $1 + 2 + 3 + \ldots + n = \frac { n } { 2 } ( n + 1 ) + 1$ is true for $n = 1$. A) yes B) no
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Question

Quizplus · Accepted Answer

For $n = 1$, the left side of the equation $1 + 2 + 3 + \ldots + n$ simplifies to $1$, and the right side simplifies to $\frac{1}{2}(1 + 1) + 1 = 2$. Since $1 \neq 2$, the equation is not true for $n = 1$.

Verify Whether 1+2+3+…+n=n2(n+1)+11 + 2 + 3 + \ldots + n = \frac { n } { 2 } ( n + 1 ) + 11+2+3+…+n=2n​(n+1)+1

Verify Whether $1 + 2 + 3 + \ldots + n = \frac { n } { 2 } ( n + 1 ) + 1$