Question

ap ch formulas ??10 clas

Answer 1

1. nth term of AP = a + (n-1)d

2. nth term of AP from end = l - (n-1)d

3. 2b = a + c

4. Sum = n/2 [2a + (n-1)d]

5. Sum = n/2 (a+l)

6. Arithmetic Mean = a+b / 2

KEY-
a - first term
d - common difference
n - number of terms
b - second term
c - third term
l - last term    

Answer 2

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$\bf\Huge\red{\mid{\overline{\underline{ ANSWER }}}\mid }$

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$\Large\fbox{\color{purple}{QUESTION}}$

WHAT IS FORMULA OF AP ?

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$\Large\fbox{\color{purple}{ SOLUTION }}$

★ FORMULAS OF AP ★

$\Large\mathfrak\pink{ \implies \: a_{n} = a \: + (n - 1)d }$

$\Large\mathfrak\orange{\implies \: s _{n} = \frac{n}{2}(2a + (n - 1)d) }$

$\Large\mathfrakl\red{\implies \: s _{n}=\frac{n}{2}(a + l)}$

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